# A sandbox

3/4 a sandbox has an area of 20 square feet. The length is 6 1/2 feet. What is the width of the sandbox?

## Correct answer:

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#### You need to know the following knowledge to solve this word math problem:

**algebra**- equation
- expression of a variable from the formula
**planimetrics**- area of a shape
- rectangle
**numbers**- fractions
- mixed numbers

#### Units of physical quantities:

#### Grade of the word problem:

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